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<?php
declare(strict_types=1);
/*
* This file is part of PHP CS Fixer.
*
* (c) Fabien Potencier <fabien@symfony.com>
* Dariusz Rumiński <dariusz.ruminski@gmail.com>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace PhpCsFixer;
use PhpCsFixer\Fixer\FixerInterface;
use PhpCsFixer\Tokenizer\Token;
/**
* @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
* @author Graham Campbell <hello@gjcampbell.co.uk>
* @author Odín del Río <odin.drp@gmail.com>
*
* @internal
*/
final class Utils
{
/**
* @var array<string,true>
*/
private static array $deprecations = [];
private function __construct()
{
// cannot create instance of util. class
}
/**
* Converts a camel cased string to a snake cased string.
*/
public static function camelCaseToUnderscore(string $string): string
{
return mb_strtolower(Preg::replace('/(?<!^)((?=[\p{Lu}][^\p{Lu}])|(?<![\p{Lu}])(?=[\p{Lu}]))/', '_', $string));
}
/**
* Calculate the trailing whitespace.
*
* What we're doing here is grabbing everything after the final newline.
*/
public static function calculateTrailingWhitespaceIndent(Token $token): string
{
if (!$token->isWhitespace()) {
throw new \InvalidArgumentException(sprintf('The given token must be whitespace, got "%s".', $token->getName()));
}
$str = strrchr(
str_replace(["\r\n", "\r"], "\n", $token->getContent()),
"\n"
);
if (false === $str) {
return '';
}
return ltrim($str, "\n");
}
/**
* Perform stable sorting using provided comparison function.
*
* Stability is ensured by using Schwartzian transform.
*
* @param mixed[] $elements
* @param callable $getComparedValue a callable that takes a single element and returns the value to compare
* @param callable $compareValues a callable that compares two values
*
* @return mixed[]
*/
public static function stableSort(array $elements, callable $getComparedValue, callable $compareValues): array
{
array_walk($elements, static function (&$element, int $index) use ($getComparedValue): void {
$element = [$element, $index, $getComparedValue($element)];
});
usort($elements, static function ($a, $b) use ($compareValues): int {
$comparison = $compareValues($a[2], $b[2]);
if (0 !== $comparison) {
return $comparison;
}
return $a[1] <=> $b[1];
});
return array_map(static function (array $item) {
return $item[0];
}, $elements);
}
/**
* Sort fixers by their priorities.
*
* @param FixerInterface[] $fixers
*
* @return FixerInterface[]
*/
public static function sortFixers(array $fixers): array
{
// Schwartzian transform is used to improve the efficiency and avoid
// `usort(): Array was modified by the user comparison function` warning for mocked objects.
return self::stableSort(
$fixers,
static function (FixerInterface $fixer): int {
return $fixer->getPriority();
},
static function (int $a, int $b): int {
return $b <=> $a;
}
);
}
/**
* Join names in natural language wrapped in backticks, e.g. `a`, `b` and `c`.
*
* @param string[] $names
*
* @throws \InvalidArgumentException
*/
public static function naturalLanguageJoinWithBackticks(array $names): string
{
if (0 === \count($names)) {
throw new \InvalidArgumentException('Array of names cannot be empty.');
}
$names = array_map(static function (string $name): string {
return sprintf('`%s`', $name);
}, $names);
$last = array_pop($names);
if (\count($names) > 0) {
return implode(', ', $names).' and '.$last;
}
return $last;
}
public static function triggerDeprecation(\Exception $futureException): void
{
if (getenv('PHP_CS_FIXER_FUTURE_MODE')) {
throw new \RuntimeException(
'Your are using something deprecated, see previous exception. Aborting execution because `PHP_CS_FIXER_FUTURE_MODE` environment variable is set.',
0,
$futureException
);
}
$message = $futureException->getMessage();
self::$deprecations[$message] = true;
@trigger_error($message, E_USER_DEPRECATED);
}
public static function getTriggeredDeprecations(): array
{
$triggeredDeprecations = array_keys(self::$deprecations);
sort($triggeredDeprecations);
return $triggeredDeprecations;
}
}
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